US PATENT SUBCLASS 75 / 709
.~.~.~ Covering the surface of molten metal

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
709.~.~.~ Covering the surface of molten metal

DEFINITION

Classification: 75/709

Covering the surface of molten metal:

(under subclass 414) Process wherein the surface of molten metal is covered by a material to prevent contact with the ambient atmosphere.

(1) Note. A container in which the metal is held will be ignored as far as placement hereunder is concerned.